Pencil coupling



Sept. 9, 1952 sw so 2,610,077

PENCIL COUPLING Filed June 24, 1947 u I Invehtor Fatenteci Sept. 9, i952 PENCIL COUPLING Harold Swanson, Brownhelm Township,

, Lorain County,0hio

Application June 24, 1947, Serial No, 756,588

8 Claims. (01. 287-114) 'This invention relates to improvements in pencil couplings which holds or fastens two pencils or similar articles together, but more particue larly to pencil couplings which holds or fastens two lengths of hexagonal drawing pencils together.

One object of this invention is to show a practical means ofv constructing a simple and reliable pencil coupling which holds or fastens two pieces or lengths of standard type hexagonal drawing pencils together. Each pencil is fastened into the ends of the pencil coupling by abayonet look like action similar to c the Pencil Lengthener and Holder invention of James P. Kusa, Patent 2,049,- 810, issued August 4, 1936, which permits a pencil to be freely. inserted, then rotated against gripping teeth to a positive stop to hold and stop the pencil therein by its hexagonal ridges.

A further object is that when two short lengths of drawing pencils are fastened together with this pencil coupling, their. combined length is long enough to be held in a persons hand, whereas each individual length of pencil is ,justa little too short to be held in ones hand while drawing, writing, marking, etc. with it. It is wellknown in the art that, when a pencil is repeatedlysharp ened and. worn down to a short length, such pencil becomes difiicult to hold in the hand; also thatsuchpshort pencil can be placed within a commercial pencil extension holder and used until it is less than one inch long before discarding. Now with the pencil coupling of this inven-.

tion, such short lengthpencil can be coupled or fastened to a new full length pencil, or two short length pencils can be connected together to make a length which is convenient to hold in the hand.

A further object is that when two lengths of pencils are coupled together with this pencil-coupling, each length acts as a pencil extension holder for the other length of pencil so that the combined length is readilyheld in a persons;

hand to draw, write',.print, etc p "A further object is that'the pe cil couplin pf this invention can be made to any "practical length to suit popular demand, which in'some instances may be only one-fourth inch 0/ long or even less. In some cases when the wood of the pencil is firm, only one-sixteenth inch length is required for this pe ncil coupling to get afgriporbite onthe square cut end of a stub pencil. f

"A further objectiis that any this invention can be made long enough to act as a' penciltextension holder which is convenient holdin'the hand;

pencil coupling a:

A further objectis that in the pencil couplings of this invention, each piece or length of pencil is individually gripped inthe pencil coupling en -'-i tirely independent from the other pencil therein.

A further object ofthis invention is that the pencil coupling shall be tubular in form to slip on or over the pencils from their ends and act as a sleeve around the pencils for suitable lengths. t a l l A further object is that any pencil cou'plin'g of this invention shall consist of 'at' least three or more partsthat are fastened together, the main part being a sleeve or tube-like section to slip on or' over the ends of two pencils, and the other twoparts being thin plates attached to themain' part that grip or bite into the ridges or flutes of said pencils as each is independently rotated a fraction of a revolution within the pencil cou-' pling. In some pencil couplings the sleeve or tube is made laminated from thin punchings that are riveted or fastened together to form a, sleeve or tube (main part), while in other pencil couplings the grip plates are each made with severalsegments; however when they'are fastened together they function as single units. I l A further 'object is that the pencil couplings shall have internal stopfiutes extending from end to end or to any suitable'len'gth within the sleeve or'tube (main part)' which permits a, pencil to be inserted therein and rotated only a fraction" of a revolution between said stop flutes.

A further object is" that the pencil coupling shall have thin plates which are positioned and fastened to' the sleeve or tube (main part) at suitable locations sothat they are forced into trations because'they providea better'balance grip and stop for an hexagonal pencil inserted therein. H

' 'A further object is that the pencil coupling grip plates can bemade with one, two, three, four. five,'or Tsix' gripping edges to suit the sleeveor tube .(main part); however only three, four and six are'shown the illustrations as they provide a better balance grip for an hexagonal pencil.

A further "object is" that the pencil coupling can 'be'madefor eitherright hand or left hand rotation to hold two pencils togetherg byfllocat- I ing the? gripping edges "of the grip plates to the right or the left of the internal stop flutes within the sleeve or tube (main part); also each end of the coupling can be made to grip its pencil with the opposite hand rotation from that rotation of the other end.

A further object is that when the pencil coupling is made to hold the pencils with opposite hand rotation from each other as observed from one end only, then the two pencils'can be tightened in the pencil coupling by twisting the pencils in the hands, like one wrings a wet cloth, without holding the coupling or even touching the strict the claims that are allowed in a single patent. which illustrates more than five types.

pencil coupling after once setting it at the-junction of the two pencils.

A further object is that the thin grip platesof the pencil coupling are made so thin that they cut or bit into the flutes or ridges of the pencils with a sort of dull knife-like action to grip or hold each pencil as it is rotated therein;

if the plate is too thin it cuts the wood, whereas itmustcompress or deform the wood so that its naturalresilience presses back against the grip plates with enough friction to holdthe pencils tightralso the indentations made in the pencil flutes ,or ridges vbythe grip plates acts like a bayonet-lock to hold the pencil from being pulled out of the pencil coupling lengthwise.

eiA furtherr object is that the thin grip plates of the pencil coupling can be so located in relation to the internal stop flutes that a slight rotational overtravel is made before the flutes or ridges of the pencil contact the internal stop flutes -of the sleeve ortube (main part). For example'if the stop flutes were not present, the pencil could be rotated completely around within the pencil coupling, and the torsion required to .turn such pencil around would be the greatestat the shortest radial distance on the gripping edge of the grip plates and diminishes both waysfrom such a point as the indentations on the flutes or ridges on the pencil rotate thereby; nowthe slight rotational overtravel is the amount of rotation that the internal stop flutes permits the pencil to rotate beyondxthe point of the greatest torsion required to turn the penoil. .lThis overtravel makes it n'ecessaryto exertgreatentwisting or wringing action tov remOve'Ja: pencil from thepencilcoupling and prevents, the pencils from coming apart from ordinaryvibration. This overtravel feature is desirable when using ashort pencil to draw, write, print, etc.i and is not-built into the commercial pencil extension holders.

.A furtherobject is that, the outside diameter of. :the pencil coupling can be made round, hexagonal, -or any other fluted shape. The fluted shape prevents the pencils from rolling on slightly inclined drafting boards.

Av further object is that the pencil coupling can ;have a vest pocket clip attached thereto for theconvenience of carrying the pencils about on; a .1 person. This clip also prevents the penoils from rolling on inclined surfaces.

,.-.A;further object is that in a pencil coupling of this invention the outer edge of the grip plates shall conform to the outer surface of the sleeve Q tube (main part) i. e.. when the sleeve or, tube (mainpart) is made' hexagonal onjits outside diameter, then the outer edges of the grip-plates are made hexagonal to match=the sleeve or tube (main part).

Afurther object is that the pencil coupling of thisinvention can be made to grip two pencils atseveral intervals along its. length, even along its; entire length if desired, by making thesleeve In the accompanying description and drawing to apply" these improvements.

..-I .'have illustrated and described several styles 'of pencil coupling parts to show that I have not overlooked the possibilities of many variations The feature which is common or generic to all types described or shown, is, the combination in a pencil coupling, of a sleeve or tube having internalflutes which slips ,over the end of a fluted pencil and permitssaid pencil to rotatea fraction of a revolution'between said internal flutes that act as stopsto limit the rotation against the flutes of said pencil, and at least one thin plate attached at or near the end of said sleeve in aposition to grip or bite into one or'more flutes of said pencil as it is rotated therein. Around the feature of said combination this invention becomesapparent by the following in which:

'Fig. rtoFig. 10, lifig. 15 and Fig. 16 are enlarged perspective views of pencil coupling sleeves.

Fig. 11, Fig. Hand Fig. "13 are enlarged'per spective views of segmental grip plates.

Fig. 14, Fig. 18 to Fig. 22 are enlarged-perspective views of endring grip plates.

Fig. 17 is an enlarged perspective view of a pencil coupling holding or fastening two pencils together. The ends of the pencils within the pencil coupling are shown in .dottedline's. Also shown isa vest pocket clip attached to the pencil coupling.

Fig.1 shows anenlarged perspective view'cf a pencil coupling sleeve; comprising a short length of hexagonal brass or other suitable material tubing I, having its inside broached, ex truded, or otherwise formed'with six stop flutes with two ridge faces on each'as shown at 2 and 3, that extend from end to end of tubing I, and having, six peripheral surfaces each as shown at 4, that also extend from end to end of tubing l between said stop flutes 2 and 3; sixriv-- grees however the angle can be made larger or smaller,; The six stop flutes 2 and 3 can be made half round ormost any other shape if desired; however the shape as shown-fits more ideally to theflats of an hexagonal pencil'which is one-hundred-twenty degrees (120?)... The out-- side ridges, flutes or corners oftheihexagonal tubing I, can be slightly rounded-pr broken isoi spi ers:

asnot to. cut ones fingers..whenrtwistingbr holding the. pencil couplingv in the hands...

Fig. 21shows an enlarged perspective view of a pencil coupling sleeve; comprising a built up stack of. punchings, stampings, or laminations as shown at 6, having the same cross-section as tubing 1, in Fig.1, all riveted or fastened a to gether later with grip plates (similar to Fig. 14) on each end. I i

Fig. 3 shows an enlarged perspective viewof a pencil coupling sleeve; comprising a stack of laminations made similar to Fig. .2, except: the outside diameter is round whereas Fig. 2 is hexagonal. The riveting holes are shown slightly smaller than thoseshown in Fig. 2 and Fig. 1.at 5., The outside diameter of the laminations in the stack can be knurled, milled 'or serrated to provide hand, gripping surfaces when the pencil coupling is twisted to a pencil in ones hands. The stack is first riveted or fastened together with three pins each in every other hole; later the, entire stack with grip plates (similar toFig. on each end is again riveted or fastened together with three additional pins through the remain.- ing holes matching the holes in the ,end grip plates. 1 V Fig. 4 shows an enlarged perspective View of a pencil coupling sleeve; comprising a short length of round brass or other suitable material tubing "5, having its inside broached, extruded or otherwise formed with three stop flutes, each with two ridge faces as shown at 8 and 9, that extend from end to end of tubing 1, and. having three peripheral surfaces each as shown at [0, that also extend from end to end of tubing 1 between said stop flutes 8 and .9; and having near each end in tubing 1, three sawed, milled or otherwise formed slots each as shownat H, six in all, which are formed to fit grip plates (similar to Fig. 12) arranged so that when viewed from one end the hole through tubing 1 ap: pears as the large center hole in Fig. 21; later the six grip plates (similar to Fig. 12) are soldered or otherwise fastened in tubing 1; and having the outside diameter of tubing 1 knurled, milled or. serrated between lines' i2 and 'l3,,or to an'ylength desired to provideahand gripping surface. when the pencil coupling is twisted to a pencil in ones hand. The inside diameter at the ridges or apexes'between the ridge faces 8 and 9;"ahd alsjo the diameter of the'three peripheral surfaces It are made to fit an hexagonal pencil with approximately thirty degrees (30) rotation similar to Fig. 1. '.It is obvious that the stop flutes 8 and 9 are the sameas' 2fand 3 in Fig. 1.

; Fig; 5 shows an enlarged perspective view of a'pencil coupling sleeve; comprising a shori length of hexagonal brass] or other suitable material tubing l4, having its inside broached, .extruded or otherwise formed {with fthree'f'sjtop' flutes, each with two, ridge faces as sho wnfat l5 and 16, that extend from end "to end of tubing M; and having three peripheral surfaces each as shown at ll, thatalso extend fro mend' to end of tubing [4 between saidstop flutes l5 and [6; three riveting or fastening holes are drilledor otherwise formed through the tubing [4 asshownat IS. The inside diameter at the ridges or apexes between the ridge faces 15 and It, ismade'; large enough to slip over the fiat faces of an hexagonalgpencilj while the diof. 1a -revolutionsbetween. said: three stop flutes 'l5fl'a'ndszl6; The ideal angle at theapexes of the three stop .fiutes is o'ne-hundred-twenty degrees (120) however-it can be made to any suitable or desired anglei I The three stop fiutes I5 and [6, can be made half round or mostany other suitable shape; however the shape as shown fits more ideally to the flats of an hexagonal pencil which is one-hundred-twenty degrees (120). '1he outside ridges, flutes or corners of the hexagonal tubing 14, can be slightly rounded or broken so as not to cut ones fingers when twisting Or'holding the pencil coupling in the hands. 1

Fig. 6 shows an enlarged perspective .view of a pencil coupling sleeve;.comprising a built up stack of punchings, stampings, or laminations as shown. at 19, having the same cross-section as tubing I 45in Fig. 5, allrriveted ,or fastened together later with grip plates (similarto Fig. 18) on each end.

Fig. 7 shows an enlarged perspective view of p a pencil coupling sleeve; comprising a stack of laminations made similar to Fig. 6, except the outside diameter is round whereas Fig. 6 is hexagonah. The riveting holes are shown slight- 1y smaller than those shown in Fig. 6 and Fig. 5 at [8. The outside diameterof the laminations in thestack can beknurled, milled or serrated to provide hand gripping surfaces when the pencil coupling is twisted to a pencil in ones hands. The entire stack is later riveted ior fastened together with grip plates (similar to Fig. 21) on each end. w I

Fig. 8 shows an enlarged perspective view of a pencil coupling sleeve; comprising a tubing 20 made similar to Fig. 1, except that the holes 5 are eliminated; having each end of tubing 20 milled or otherwise fermed with three grip plate cuts 2| and 22 as the bottom of the same, six in all, which are cut or formed to fit grip plates (similar to Fig. 11) arranged so that from one end the hole through tubing 20 appears like the large center hole in Fig. 19, when the grip plates are later soldered or otherwisefastened therein against the end faces 23. l w l w Fig. Qshows an enlarged perspective view of a pencil coupling sleeve; comprising a tubing 24 made similar to Fig. 5, except that the holes I 8 are eliminated; having each end .ofltubi-ng 24 formed with three grip plate cuts 25-and 26 as the bottom of the same, six in all, which are made similar to the cuts in Fig. 8 at 2l and 22, to fit grip plates (similar. toFig. 11) arranged so that from one end the hole through tubing 24 appears like the large center hole in Fig. 18, when the grip plates are later soldered or otherwise fastened therein. 4 7 Fig. 10 shows an enlarged perspective View of a pencil coupling sleeve; comprising a tubing 2] made similar to Fig. 4, except that the sawed slots ll are eliminated; having each end of tubing 21 milled or otherwise formed with three grip plate cuts 28 andZQ as the bottom of the sanie, six in all, which are cutor formed to fitgrip plates (similar to Fig. .12), arranged so thatfroin one end the hole through tubing 2! appears like the large center hole in Fig. 21, when the grip plates are later soldered or otherwise fastened" ameter at the three'intermediatesurfaces I1;

is made large enough to {slip over the ridgesof said pencil; and permits-said pencil to herotated' approximately only thirty degrees (30) therein. 7 Fig. 11 shows an enlarged perspective View of a pencil coupling segmental grip plate; comprising a thin plate of hardened steel or other suitable metal which'is made to fit the end cuts in Fig. 3 orfFig.-9 at 2| and 22 or 25 and :26 respectively, and later soldered or otherwise fastened therein;

Fig. 12 :shows .an enlarged perspective View .of :a pencil coupling :segmental grip plate; comprising a-thin-plate of hardened steel orother suitable metal'which is made tofitinto .the.sawed slots inLFig. 4 at H, or the endcuts in Fig. 10 or Fig. 15 at228 and'29or 32 and 33 respectively, and later soldered. or otherwisefastened-therein. .Fig. .13 shows anenlarged perspective view of a pencil'coupling segmental grip plate; comprising a thin plate of'hardened steel or other suitable metal which is made to fit the-end-slot cuts-in Fig.16 at 35., 36, and 3.1,rand later soldered orotherwise fastened therein.

Fig. 14 shows an enlarged perspective view of'a pencilxcouplingend ring grip plate; comprising a thin: plate orwasher of "hardened steel or other suitable metal which ismade hexagonal to fit the outside end -of tubing in Fig. 1, and having an hexagonal hole 30 therein which is rotated :approximately fifteen degrees (15") from the outer hexagonal edges as shown; riveting holes are drilled or otherwise formed through the washer to match the six holes at in Fig. 1; hexagonal hole 30 ismade large enough to just slip overan hexagonal pencil. This grip plate islater riveted or fastened to each end of apencil coupling sleeve (similar to-Fig. 1 or Fig.2).

7 Fig. :15 shows an enlarged perspective view of a pencil coupling sleeve; comprising a tubing 3| made :similar to Fig. 10, except that theinside hole through tubing 3| is like the inside hole through tubing in Fig. l, and having end grip plate'cuts 32 and 33 arranged like 28 and 29 'in Fig. to fit Fig. 12 so that from one end the hole through tubing 3| appears like the large center hole in Fig. .19, when the grip plates are later soldered'or otherwise fastened therein.

Fig. 16 shows an enlarged perspective view-of apencil coupling sleeve; comprising a tubing 34 made similar to Fig. 15, except that the'end cuts 32 and 133 are-modified-to heel in the end grip plates; having tubing 34 formed with six grip plate cutsas shown at 35, 36, and 37 to fit grip plates (similar to Fig. 13) arranged so that from one endthe hole through tubing 34 appears like the large center hole in Fig. 19, when the grip plates are'later soldered or otherwise'fastened thereirnand heels against-the edges at 31. v

Fig. 17 shows an enlargedperspective view of a'pencil coupling holding or fastening two pencils together; comprising a pencil coupling sleeve 38 similar to Fig. '7 with end ring grip plates 39 and-4U;similar-to Fig. 19 but with only three riveting holes to match Fig. 7 that are riveted or fastened thereto; a short length and along length of regular'hex-agonal drawing pencils 4| and 42 are each inserted into the pencil coupling and twisted or turned by hand so as to cause the grip plates 39 and 40 to be forced into the ridges or flutes of eachpencill or 42 as shown at 43to hold the pencils like a bayonet lock; the square cut ends of the pencils 4| and 42 are shown at 44 and 45; also shown is a vest pocketclip' 46 which can be soldered or otherwise fastened to the tubing or sleeve38, which acts as a stopto prevent rolling. of the pencils on slightly inclined surfaces. 'While the pencils themselves are not part ofthe invention, yet they become the main I suitable metal. which is made hexagonal .to hi; the outside 'aendlof tubing 1:4 in Fig. .5, and havinga large .cente'r'hole with three .chordal edges 41 :and three peripheral edges 48 of sixty degrees (60) each, that is rotated approximately fifteen degrees (1 5 from the outer'hexagonal edges as shown; riveting holes are. drilled or otherwise formed through the washer to match thev three holes l8 in Fig. 5; the large center hole is made large enough .to .just slip over an hexagonal pencil. .gripplate is later riveted or fastened to each end of a pencil coupling sleeve (similar :to Fig. .5 .or Fig. -6) It is obvious that the chordal edges 4;! are the same. length as the hexagonal edges 30 in Fig. 14, and in the same relation to the outer hexagonal edges of the washers.

Fig. 19 shows an enlarged perspective view of a pencil coupling end ring grip plate; comprising a-thin plate or washer-of hardened steel or other suitable metal made round on .the outer edge tofit Fig. 3, and having a large center hole with three chordal edges 49 of sixty degrees (60) each, and three stop edges 50 and 5| that are similar to I5 and i6 in Fig. 5, and three peripheral edges 5.2 of thirty degrees (30) each; riveting holes are drilled or otherwise formed through the washer to match the six holes in Fig. 3; the large center hole is made large enough to just slip over an hexagonal pencil. Ehis grip plate is later riveted or fastened to each end of a pencil coupling sleeve (similar to Fig. 3). It is obvious that chordal edges 49 are the same length as the hexagonal edges 30 in Fig. 14; also thestop edges 53 and 5| are of-fiiteen degrees (15") each.

Fig. 2 0 shows an enlarged perspective view of a pencil coupling and ring grip'plate; comprising a thin plate or washer of hardened steel-or other suitable metal made round on the outer edge to fit Fig. 7, and having a large center hexagonal hole 53 that "is "the same as hole 30 in Fig. 14; riveting holes are drilled or otherwise formed through the washer to match the three holes in Fig. 7. This grip plate is later riveted or fastened to each end of a pencil coupling sleeve (similar to Fig. 7 or Fig. '3).

Fig. 21 shows an enlarged perspective view of a pencil coupling'end ring grip plate; comprising a washer made similar to Fig. 20, except that the large center hole is made like the hole in Fig. 18. This grip plate is later riveted or fastened to each end of a pencil coupling sleeve (similar to Fig. ,7 or Fig. 3).

Fig. 22 shows an enlarged perspectiv view of a pencil coupling end ring grip plate; comprising a thin plate or washer of hardened steel or other suitable metal which is round on the out er edge, andhaving a large center hole withiour chordal edges 54 and two peripheral edges 55' of sixty degrees (60) each; riveting holes are drilled'or otherwise formed through the washer to match'four of the six holes in Fig. 3. This grip plate is later riveted or fastened to each end of a pencil coupling sleeve (similar to Fig. 3). It is obvious that the c hordal edges 54 are the same length as the hexagonal edges 30 in Fig. 14.

In Fig. 14, and Fig. '18 to Fig. 22, which are end ring grip plates, the chordal edges of the large center holes therein,are the gripping edges which are forced into thewooden flutes or ridges of an hexagonal pencil to .form a sort of bayonet lock therewith. An end ring grip plate can bemade with any number up tosix of suchchordal-edges, also in some cases it requires only one gripping edg t h ld "a pencil in th pen il coup in When les th n sixo such clip-real edges are asi e??? 9. made therein, the remaining edges of the: large center hole ,between wthe chordal edges can be radial or any'othera'form, just so. that it permits an hexagonal pencil to. be inserted therein. and rotated tosthe grippingiposition of the chordal edges. i The end 'ri'nggrip platesucan be fastened to the pencil coupling sleeves (Fig.1 to Fig. 10, Fig.'l5and Fig. 16) bysolderin'g, brazing, welding, dowels, screws 'sorrivets. When-the? grip plates are made of hardened steeLthey lastmuch longerthan those made'from hard copper alloys. In Fig. 1 to Fig. '10, Fig. andFig; 16, which are pencil coupling sleeves, theinternal stop flutes extend'from end to end, however they canbe made'to any suitable length therein; also the riveting or fastening holes can be made to any suitable depth therein. g

In several of the pencil couplings illustrated herein, it is possible to out thepencil coupling in halves and fastena long tube between the halves, which then can be used as a double end pencil extension holder. -It is also obvious that these pencil couplings can be made tosuch a long length that they can be used as a double end pencil extension holder, as the grip plates can grip the pencil at any place along its entire length.

In Fig. 2, Fig. 3, Fig. 6, and Fig. '7, the pencil coupling sleeves are built up into a stack from laminations; with such construction it is possible to place the end grip plates (Fig. 14, Fig. 18 to Fig. 22) between the laminations in as many places as desired to provide greater gripping length on the pencils held therein, even up to the full length of the coupling if required for some particular application.

The pencil coupling sleeves can also be made from plastic material as well as metal. It would also be practical to mould the hardened steel grip plates integral With the coupling sleeve when it is made of low fusing metal alloy or moulded plastic with the riveting pins acting as reinforcement bars therein.

If pencils were made triangular, square, pentagon, or any other fluted shape, these pencil couplings could be made relatively similar to accommodate such pencil just like they now fit the hexagonal pencil. In other words the hexagonal pencil is the commonly accepted form that suits the commercial trade, but if another fluted form of pencil should be marketed, then the pencil coupling of this invention could be modified to suit such pencil and still retain the features described herein.

A further object of this invention is that any pencil coupling sleeve, and any end ring grip plate, can be made to any outside or inside form that is described herein; for example in Fig. 19 the inside form shown could be made with an hexagonal outside form.

In the description of the pencil couplings shown herein, it is obvious that the sequence of building operations described can be changed without materially altering the finished pencil coupling; also some parts of one pencil coupling can be substituted for a similar part in another pencil coupling; therefore a further object of this invention, is that each part or each feature of that part which can be used with another part or feature shown or described herein, shall be an improvement of this invention.

In view of the drawing and preceding description, it is obvious that the improvements of this invention can be used to make many more pencil couplings other than those pencil couplings shown 10 ordescribedherein; also these pencil couplings can be used to couple other articelstogetherbe sides pencils, such as thin wall metal tubing, fishing poles, tinker toys, ends of clothes line having rigid plastic moulded tipsthereon, canes, cane handles, umbrella parts, hand flag poles, fountain pen caps, pencil erasercaps, and many other small 'articlestoo numerous to mentionytherefore in anticipation of'the manufacture. of i such couplings, it is a-further object of this invention to extend the claimsto, include anycoupling which uses oneormore of the improvements shown, described,or claimed herein.:*- Iclaimq. 'f 11.,53 11 i,

11.. Apencil coupling for connecting inqaxial alignment two hexagonal pencils, consistingof, a tubular sleeve qhaving internal jstop. flutes ie'xe. tending fromend toendrthereof, tw'o grip plates attached to theends. of said sleeve, said'stop flutes providing a means for 'manualpartial rota tion of saidpencils in said/sleeve, said gripu plates having inwardmpr'ojecting gripping edgesmfor formingindentations on the hexagonal ridges of i said pencils during said rotation, said stop flutes and said grip plates against said indentations providing a means for gripping and holding said pencils together within said coupling.

2. In a pencil coupling, the combination of a tubular sleeve having internal stop flutes extending from end to end thereof, two thin grip plates attached to the ends of said sleeve, said sleeve with said flutes and said grip plates providing a means for the manual insertion and rotation to grip and hold two hexagonal pencils together within said coupling.

3. In a pencil coupling, the combination of, a

ping edges and being attached to the ends of said sleeve, said stop flutes and said grip plates coordinately fixed with said sleeve to provide for the manual insertion and rotation of two hexagonal pencils abutting end to end within said coupling, said stop flutes providing a means for the manual rotation of said pencils to approximately thirty degrees (30) within said sleeve, said grip plates providing a means for forming indentations on the hexagonal ridges of said pencils during said rotation, said indentations providing a means for holding said pencils within said coupling.

5. A pencil coupling, comprising, a tubular sleeve and two grip plates, said sleeve having inwardly projecting stop flutes extending from end to end thereof, said grip plates having inwardly projecting gripping edges and being attached to the ends of said sleeve, said stop flutes providing a means for the manual rotation of two hexagonal pencils to approximately thirty degrees (30) within said sleeve, said grip plates providing a means for forming indentations on the hexagonal ridges of said pencils during said rotation, said stop flutes and said grip plates against said indentations providing a means for gripping and holding said pencils together within said coupling.

' 1 6a Ina pencil coupling,thecombinationof a stack of laminated inetalfplates-oftwof-foims and all fastened together; one form ofsaid metal plates being stacked together into a tubular sleeve having internal'stopfiutes extending from endto end thereof; the other form being twothin plates attached to the ends" of said sleeve, said thin plates being grip plates: for forming indentations" onthe; hexagonal ridges of two pencils, said indentations providing a means for holding said. pencils in said sleeve.

7 'Inapenci-l coupling, the combination of, a stack of laminated plates all fastened together to form said coupling, said plates stacked to: form Onecenter section and two end sections, said center section forming a sleeve for said coupling, said" end sections forming grip plates for said coupling, 'saidi'sl'eevehaving internal stopflutes extending from end to end thereof, said grip platesi having? inwardly projecting gripping edges for forming indentations on the ridges. of two hexagonal pencilsin saidcoupling, said stop flutes and said grip. plates against said indentations providing a means for the manual rotation of two hexagonal pencils to approximately thirty degrees; (30). in saidjsleeve, said. grip plates: having inward projecting gripping edges for forming indentations. onzthe hexa-gonal edges: of said pensaid indentations providing a. for

gripping and holding'saidtpencilsin said coupling;

SWANSQN.

REFERENCES CITED The following references are of record in the file of this patent; UNITED STATES PATENTS.

' Name Date Kusay Aug. 4,1936- Number 

